<!DOCTYPE html>
<html>
    <head>
        <style type="text/css">
            *{
                margin: 0;
                padding:0;
            }
            #header{
                height: 100px;
            }
            #header .left{
                background-color:#FF00FF;
                height: 100%;
                width: 20%;
                float: left;
            }
            #header .center{
                background-color: #FFFF00;
                margin: 0 1%;
                width:58%;
                height: 100%;
                float: left;
            }
            #header .right{
                height: 100%;
                width: 20%;
                background-color:#AAFF00;
                float: left;
            }
            #nav{
                height: 30px;
                width: 100%;
                margin: 10px 0;
                background-color:#00BBFF;
            }
            #main{
                height: 800px;
            }
            #content{
                width: 75%;
                height:100%;
                float: left;
            }
            #content .left1{
                width: 40%;
                height: 49%;
                background-color: #CCCCCC;
                float: left;
                margin-bottom: 1%;
                margin-right: 1%;
            }
            #content .left2{
                width: 40%;
                height: 49%;
                background-color:#CCCCCC;
                float: left;
                clear: left;
                margin-right: 1%;
            }
            #content .right1{
                width:59%;
                height: 49%;
                float: right;
                margin-bottom: 1%;
                background-color:#CCCCCC;
            }
            #content .right2{
                width: 59%;
                height: 49%;
                float: right;
                background-color: #CCCCCC;
            }
            #aside{
                width: 24%;
                height: 100%;
                float: right;
                margin-left: 1%;
                background-color:#FFFF00;
            }
        </style>
    </head>
    <body>
        <div id="header">
            <div class="left"></div>
            <div class="center"></div>
            <div class="right"></div>
        </div>
        <div id="nav"></div>
        <div id="main">
            <div id="content">
                <div class="left1"></div>
                <div class="right1"></div>
                <div class="left2"></div>
                <div class="right2"></div>
            </div>
            <div id="aside"></div>
        </div>    
    </body>
</html>
    